<?php

/**
 * @copyright  For copyright and license information, read the COPYING.txt file.
 * @link       /COPYING.txt
 * @license    Open Software License (OSL 3.0)
 * @package    Mage_ConfigurableSwatches
 */

/**
 * @package    Mage_ConfigurableSwatches
 */
class Mage_ConfigurableSwatches_Model_Resource_Catalog_Product_Attribute_Super_Collection extends Mage_Catalog_Model_Resource_Product_Type_Configurable_Attribute_Collection
{
    private $_eavAttributesJoined = false;

    private $_storeId = null;

    /**
     * Filter parent products to these IDs
     *
     * @return $this
     */
    public function addParentProductsFilter(array $parentProductIds)
    {
        $this->addFieldToFilter('product_id', ['in' => $parentProductIds]);
        return $this;
    }

    /**
     * Attach (join) info from eav_attribute table
     *
     * @return $this
     */
    public function attachEavAttributes()
    {
        if ($this->_eavAttributesJoined) {
            return $this;
        }

        $this->join(
            ['eav_attributes' => 'eav/attribute'],
            '`eav_attributes`.`attribute_id` = `main_table`.`attribute_id`',
        );

        $this->_eavAttributesJoined = true;
        return $this;
    }

    /**
     * Set store ID
     *
     * @param int $storeId
     * @return $this
     */
    public function setStoreId($storeId)
    {
        $this->_storeId = $storeId;
        return $this;
    }

    /**
     * Retrieve Store Id
     *
     * @return int
     */
    public function getStoreId()
    {
        return (int) $this->_storeId;
    }

    /**
     * Bypass parent _afterLoad() -- parent depends on single product context
     *
     * @return $this
     */
    protected function _afterLoad()
    {
        Mage_Core_Model_Resource_Db_Collection_Abstract::_afterLoad();
        $this->_loadOptionLabels();
        return $this;
    }

    /**
     * Load attribute option labels for current store and default (fallback)
     *
     * @return $this
     */
    protected function _loadOptionLabels()
    {
        $labels = $this->_getOptionLabels();
        foreach ($this->getItems() as $item) {
            $item->setOptionLabels($labels);
        }

        return $this;
    }

    /**
     * Get Option Labels
     *
     * @return array
     */
    protected function _getOptionLabels()
    {
        $attributeIds = $this->_getAttributeIds();

        $select = $this->getConnection()->select();
        $select->from(['options' => $this->getTable('eav/attribute_option')])
            ->join(
                ['labels' => $this->getTable('eav/attribute_option_value')],
                'labels.option_id = options.option_id',
                [
                    'label' => 'labels.value',
                    'store_id' => 'labels.store_id',
                ],
            )
            ->where('options.attribute_id IN (?)', $attributeIds)
            ->where(
                'labels.store_id IN (?)',
                [Mage_Catalog_Model_Abstract::DEFAULT_STORE_ID, $this->getStoreId()],
            );

        $resultSet = $this->getConnection()->query($select);
        $labels = [];
        while ($option = $resultSet->fetch()) {
            $labels[$option['option_id']][$option['store_id']] = $option['label'];
        }

        return $labels;
    }

    /**
     * Get Attribute IDs
     *
     * @return array
     */
    protected function _getAttributeIds()
    {
        $attributeIds = [];
        foreach ($this->getItems() as $item) {
            $attributeIds[] = $item->getAttributeId();
        }

        return array_unique($attributeIds);
    }
}
